Encyclopedia of building materials: treatment and utilization of glass fiber waste silk

The system consists of cleaning, crushing, cleaning, drying and transportation.
Waste silk

Waste paper tube, wire, nut and other debris, open wire, metal detector.

Waste silk broken

At the entrance of the crusher, it is necessary to set a counter roller for controlling the feed amount. The product is 5mm short fiber and powder, and the finer grain size: secondary crushing after drying, plus air selection device.

Waste wire washing

After rinsing with water, the sizing agent attached to the fiber is washed away, and the water of the waste silk is washed, and the water treated by the sewage treatment station can be used, with little or no tap water. The rinsed water is returned to the sewage station for treatment. The rinsed fibers are initially separated from the water by a sand water separator.

Waste silk drying

It is fed into the dryer by the hoist for continuous drying. The hoist has a frequency conversion speed regulation function, and the feeding speed affects the moisture content of the product after drying. The energy of the dryer is natural gas, steam-dried, and dried by the kiln residual hot air. The fiber content after drying is less than 1%. According to the production needs, it can be put into the tank or ton bag for spare use, or it can be pneumatically delivered to the use bin.

Utilization of waste silk

1. Application in continuous fiber production

Note the following:

1 The kiln head is equipped with double-side feeding, and the feeding amount of both sides is the same as much as possible.

2 should be as dry as possible, the moisture should not exceed 1%, and the alkali-free kiln should be the same.

3 The alkali-free waste silk can be finer in size, while the medium base is the opposite, as thick as possible.

4 Supplement the volatile components B and F in the chemical composition of glass fiber.

2. Application in glass wool production

1 Since the medium alkali 5# glass fiber component is the same as the medium alkali glass wool component, the medium alkali waste silk can be directly used for the production of medium alkali glass wool.

2 alkali-free glass fiber composition and alkali-free glass wool composition comparison:

Comparison description

It can be seen from the comparison that there is only a slight difference in other components such as Si, Al, B, and R2O except for the difference between CaO and MgO. In the production, the raw materials introduced into the original formulation of CaO and MgO are mainly supplemented, and the remaining components can be adjusted slightly to meet the production needs.

3. Application in embossed glass production

The use of waste silk to produce embossed glass has been introduced. The main method is to arrange a composition similar to embossed glass according to the composition characteristics of medium and non-alkali waste silk according to the 2:1 medium and non-alkali waste silk. As shown in the following table:

By using quartz sand and soda ash, the low SiO2, R2O and high CaO, MgO, Al2O3 and other components are corrected to form a composition formula that meets the production needs. The approximate formula is as follows:

In production, care should be taken to properly control the annealing temperature (around 570 ° C) and the molding temperature.

4. Application in glass mosaic production

The use of medium and non-alkali waste silk to produce glass mosaics has been used for many years. Due to the different color of glass mosaics, there are certain differences in composition. According to the composition requirements of different colors, the use of medium or non-alkali waste silk is selected. However, in order to meet the requirements of product color and thermal stability, chemical stability, mechanical strength, etc., it is necessary to further adjust the composition, and appropriately add minerals such as silica sand, limestone, potassium feldspar, albite, soda ash, fluorite, etc. Raw materials and different colorants.

5. Using ceramic fiber waste silk to produce ceramic glaze

The basic components of glass fiber are all the components required for ceramic glaze, especially 7% of B2O3 in alkali-free fiber. It is a common ingredient for glaze, which can reduce the melting temperature of glaze, prevent glaze cracking and improve glaze. Surface hardness, gloss and chemical resistance. Due to the relatively high price of boron raw materials, the proportion of glaze costs is very high. Making full use of the useful components of waste silk can greatly reduce the production cost of glaze.

Conclusion

1. The waste yarns listed above are all examples that have been tested in production practice, are technically feasible, and are economically significant.

2. Taking the alkali-free waste silk as an example, the raw material cost of the waste silk is about 1050 yuan/ton, and the boron raw material accounts for about 600 yuan/ton. At present, the price of waste silk take-out is only about one hundred yuan per ton. It can be seen that the utilization of waste silk has great economic value, and making full use of the useful components of waste silk can bring considerable economic benefits.

3. According to the composition of waste silk, actively explore the channels of utilization, the use of waste silk can not only bring certain economic benefits but also reduce pollution and pollution for the society. It can be described as two things. Conditional enterprises, based on the composition of waste silk, actively explore ways and channels of utilization to create more wealth for enterprises and society. Add a clear water and blue sky to our human living environment.